Hook 5 request for info

Recently purchased a Lowrance Hook 5, the screen has a lot of clutter from the surface down to the bottom, cannot distinguish any fish, (if any) between the top and bottom. Any suggestion on how to correct this?

On our old unit (black & white) the fish where symbols of fish in various sizes, does / will the Hook be able to show fish symbols?

I bought a Hook 7 a few months ago and before I ever fished with it i sat in the garage playing with menus and settings for a couple nights. What you are looking for is in the Sonar Menu. Pull up the sonar page and hit MENU to access the sonar menu. Here's the link to the User Manual online if you need it.

FISH-
That's what I've come to find out too. I will run DSI and the Sonar side by side to relate the better DSI picture to what I see on the Sonar image. What looks like a fish on Sonar doesn't always show up as a fish on the DSI. On a side note(question): Does the fish show as an arch when fishing areas like the Basin where its mostly shallow or is the arch better defined in deeper water?